OB10 Minuet Knob Manufactured.

[boater sam]

Following the discovery that the tuning knob, kindly supplied by Fixitnow, was different to the broken one on this KB OB10 radio, I decided to attempt a marriage of the new knob with a 6mm center boss and the old and very odd center boss socket from the original broken one.
The spindle boss is considerably larger and splined internally to fit on the tuning capacitor spindle extension which has the pilot lamp inside.

The brass ring and center bright were released easily from the new knob and cleaned with fine sandpaper, they were too badly corroded to just polish. I will polish them later after fitting as they are a little thin and fragile.

The spring ring was removed from the 6mm plastic socket and the socket part removed completely down to the bottom which left a bevelled recess in the inside center of the knob.

The remains of the broken knob were ground down to leave the boss with a matching bevel to the new knob center. This was then epoxy glued into the new knob being careful to match the original length and ensuring it was central and truly perpendicular to the knob body.

The brass ring and bright were reglued with impact adhesive to the knob face. the pointer and the spring tension ring refitted to the knob boss.
The pointer has to be set horizontal with the tuning capacitor at one end of its travel.

And this KB OB10 Minuet has a tuning knob indistinguishable from its original.

Thanks to all that have contributed to this tricky repair. Now I need to fix the radio and clean and polish it all.

Sam.

[Mark Hennessy]

Sounds impressive - looking forward to the pictures!

[boater sam]

Oh, you expect pictures?

Not getting any, its done an' dusted. Its a bit difficult photographing clear plastic parts! I get carried away and forget the pix.

The pix on the other wanted thread will show what was required.

There still does not seem to be an answer to the discrepancy about the different knobs, all the OB10 info I can find mentions the pilot lamp being in the center of the knob, in the large plastic spindle. I can't see where else it could be if the 6mm boss knob was fitted.

Has anyone got an OB10 that does not have a pilot lamp?

[boater sam]

Do the other KB Minuets, like the FM ones, have pilot lamps?

[Crackle]

I thought I mentioned to you already my PB10FM had a pilot light in the dial. But I dont think my OB10 or my QB20 had an illuminated dial. I dont have any of these models now.
PB10FM
   

OB10
   

QB20
   

Mike

[boater sam]

Your PB10FM has chrome brights on the small knobs like my OB10 but a solid brass tuning bright.
The QB10 and OB10 have the perforated bright with a variation of chrome and brass on the small knobs. 
It would seem logical that the perforated bright should have a lamp behind it but it is not so.
There seems to be a choice when they built these about which box they dipped in for parts!

[Crackle]

Hi Sam
All my Minuets were with brass brights including the PB10FM its just the light reflection, I have never seen a Minuet with chrome brights.
All my ones arrived with at least one bright missing. I made new ones from brass rod.
I didn't think the tuning dial centre bright with the 8 bars in a circle is actually perforated, they are just indentations, filled with black paint, or dirt.

Anyway I am pleased yopu have got your one sorted. What is the tuning like, I wondered if it was a little difficult to tune without a slow mo drive on MW. The PB10FM (the one with the illuminated dial) is a little different as the tuning range on the dial is almost 330 degrees round the dial and setting the tuning was fairly easy.

Mike

[boater sam]

Tuning is yet to be explored, the set is deaf, though the AF has some output, there is no reception.
The bright is perforated, the light shines through, the acrylic acting as a light guide. This effect will now be attenuated somewhat as it is no longer one piece, the interfaces will not carry the light over.
I will have to remount the tuning capacitor as it is wagging about a bit. Then sort out the faults.
There seems to be some divergence on the printing of 'volume' and 'wave bands' on the front. Some sets have the printing on the flat area others on the ribbed area. 
The sets seem to be very individual in their detail appearances, not having seen many KB products, is this general from this manufacturer?
Sam.